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Firm
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On Sale
Overview
- SleepMatch: blue
Casper One Firm Mattress 11"
- The mattress that broke the internet - reimagined!
- Every layer of foam is designed for all night breathability
- Three layers of supportive and pressure-relieving foam soothe your body
- Uniquely supportive with the perfect bit of bounce
- Same Day Delivery!
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In Stock
Overview
Casper One Firm Mattress 11" Twin XL
Firm foam keeps your lumbar where it belongs
Breathe Flex Foam™ surface bounces back fast
Align Memory Foam™ cradles hips without bottoming out
Dense Casper Core base resists long-term sag
Three-layer all-foam build stays quiet all night
The Casper One Firm Mattress 11" is an all-foam mattress built for back and stomach sleepers who need a firm mattress for back pain relief without sacrificing pressure relief at the shoulders and hips. Perfected from ten years of real sleeper feedback, it stacks three purposeful layers of foam into a clean 11-inch profile that holds its shape year after year. There is no wasted material here, just the layers that actually change how you feel in the morning. Stop by any Mancini's Sleepworld location and our sleep specialists will put this next to every option in its class so you can feel the difference for yourself.
COMFORT AND FEEL: Firm and responsive with a slight give that supports the spine without feeling rigid.
SIZE: This Twin XL sized mattress is a natural fit for taller solo sleepers, college dorm rooms, and single adults who want full-length comfort without a wider footprint.
BEST SLEEP MATCH: Back sleepers and stomach sleepers will get the most from this firm mattress for back sleepers. The firm surface keeps the hips lifted and the lower back supported through the night.
BEST FOR: Ideal for sleepers who wake up with lower back tension, need a non-sinking foam surface, or want a quiet mattress that won't transfer movement.
CONSTRUCTION SPECIFICATIONS: The top Breathe Flex Foam™ layer is open-cell and responsive, so it bounces back the moment you shift. Align Memory Foam™ sits in the middle, contouring lightly to relieve pressure without that stuck-in-the-mattress feeling. The firm Casper Core base keeps the structure honest, preventing the soft-out-over-time sag that shortens most budget foam beds. Foams meet CertiPUR-US® standards for low emissions and material safety.
SETUP AND COMPATIBILITY: Arrives rolled and compressed in a box, expands within a few hours, and requires no tools. Compatible with adjustable bases, platform frames, and slatted foundations with slats no more than four inches apart.
NOT A FIT FOR: Sleepers over 230 pounds who need deep midsection support, or side sleepers who prefer a plush, close-conforming feel at the shoulder.
YOUR SLEEP, BACKED BY US
Every mattress purchase at Mancini's Sleepworld includes a 120-night comfort guarantee backed by our Rest Easy Promise and our Best Price Guarantee. Add a premium mattress protector at the time of purchase and you can extend that to a full 365 nights. Come try this mattress in one of our locations before you buy, and ask about free next-day delivery, in-home professional setup, and flexible financing options.
Features
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Suitable For Adjustable Base
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Motion Separation
- SleepMatch: blue
Casper One Firm Mattress 11"
Features
- SKU: CAS-ONE-3XM-FM-24
- MPN: 950-000151-002
- GTIN: 192472031351
- Brand: Casper
- Collection: One
- Type: Memory Foam
- Mattress In A Box: Yes
- Firmness: Firm
- Height: 11
- Length: 80
- Width: 38
- Shipping Height: 42
- Shipping Width: 15.5
- Shipping Length: 15.5
- Warranty: 10 Year Limited
- Weight Capacity: 600
- Cover Material: 98% Polyester, 2% Spandex
- Quilting Layers: Polyurethane Foam
- Comfort Layers: Polyurethane Foam
- Support System: Memory Foam
Specification
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Suitable For Adjustable Base: Yes
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Motion Separation: Yes
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On Sale
- Delivery by May 09
